CAJ | 학술논문

利用常规气象资料和大连多普勒雷达资料,从天气背景、温度对数压力图和雷达反射率因子演变特征方面对2009年10月13日大连北部地区的冰雹天气过程进行分析.结果表明,此次冰雹天气发生在500 hPa冷温槽前部,因500 hPa冷槽转竖触发低层切变线而形成.冰雹发生前大气有不稳定能量和水汽输送条件.中低空切变线加剧了大气层结不稳定,促进不稳定能量的释放,产生冰雹天气,高低空急流配合为强对流发展提供了动力条件.多普勒雷达资料分析表明,强对流天气由多个对流单体组成,发展强盛时有钩状和V形缺口等特征,强回波区50～60 dBz.
이용상규기상자료화대련다보륵뢰체자료,종천기배경、온도대수압력도화뢰체반사솔인자연변특정방면대2009년10월13일대련북부지구적빙박천기과정진행분석.결과표명,차차빙박천기발생재500 hPa랭온조전부,인500 hPa랭조전수촉발저층절변선이형성.빙박발생전대기유불은정능량화수기수송조건.중저공절변선가극료대기층결불은정,촉진불은정능량적석방,산생빙박천기,고저공급류배합위강대류발전제공료동력조건.다보륵뢰체자료분석표명,강대류천기유다개대류단체조성,발전강성시유구상화V형결구등특정,강회파구50～60 dBz.
By using regular meteorological data and Doppler radar data, causes for a hail storm over northern area of Dalian on Oct. 13, 2009 were analyzed from several aspects, including synoptic background, T-LnP charts and the characteristics of radar reflectivity factor evolution. The results showed that the hail storm occurred in downstream of 500 hPa trough. The 500 hPa cold trough turned zonally and triggered the formation of shear line on lower level. Before the hail event, instability energy and moisture supply were observed. The shear line on lower level intensified the atmospheric instability, promoted the release of potential energy, caused the hail event. The cooperation of upper and lower level jet streams provided favorable dynamic condition for strong convection development. The Doppler radar analysis showed that strong convection was comprised of multiple convection cells, which demonstrated "L" and "V" shapes during mature stage, with peak intensity of 50-60 dBz.